7-sinf. Bilimlar bellashuvi test

7-sinf. Bilimlar bellashuvi test

1.Quyidagi sonlardan qaysi biri 0,(6) gat eng? A) 0,(666) B) C)0,6666667 D)1,6

2.Hisoblang:

A) B) C) D)

3. 20•2^4n-6 - 80•(4^n-2 )² ifodani soddalashtiring . A) 4²ⁿ B) 0 C) 2^n-1 D) 4

4.0,34•0,00025 ko`paytma quyidagi sonlardan qaysi biriga teng emas. A)850•10^-7 B)8,5•10^-5 C) 8,5•10^-6 D) 85•10^-6

5.Ko`phadni ko`paytuvchilarga ajrating.

A)3(3x-4y)(y-2z)(2x-3z) B)6(4y-3x)(2y-z)(3x-2z)

C)3(4y-3x)(2y-z)(2z-3x) D)-3(3x-4y)(z-2y)(2z-3x)

6. 2³²¹⁵ +9³²⁶ +7⁴²⁵ ning oxirgi raqamini toping. A)0 B)4 C) 6 D )1

7. (1- )•(1- )•…..•(1- ) ni hisoblang. A) B) C) D)

8. (y²-1)²-(y²-1)•(y⁴+y²+1)+y ni soddalashtirgandan keyin nechta haddan iborat bo`ladi?

A)5 B)4 C)3 D)6

9. 264 va 840 ning umumiy bo`luvchilari nechta? A)4 B)9 C)8 D)6

10. 9; 10; 15 va 27 sonlaridan nechta o`zaro tub sonlar jufti hosil qilish mumkun?

A)3 B)4 C)6 D)2

11. 453,21 sonini standart shaklda yozing.

A)4,5321•10² B)4,5•10³ C)4,5321•10³ D)4,53•10²

12. Hisoblang ( 3 -1,52): 1,1+(1 -1,842)^. 1 A)2 B) -1 C) -0,9 D) 1

13. Bugun yakshanba kun deb qabul qilsak 67 kun oldingi kun nima?

A)seshanba B)chorshanba C)payshanba D)juma

14. To`g`ri to`rtburchakning bo`yi 20% ga orttirildi . Uning yuzi o`zgarmasligi uchun enini necha foizga kamaytirish kerak ? A) 16 B) 20 C) 18 D) 25

15. bo`lsa ning qiymati nimaga teng ?

A) -2 B) - C) - D)

16. Birinchi kvadratning perimetri ikkinchi kvadratning tomoniga teng bo`lsa ,

Ikkinchi va birinchi kvadratlarning yuzalari nisbatini toping ?

A)4 : 3 B) 2: 3 C) 2: 1 D) 3:1

17. 1 dan 120 gacha sonlar ichida 2 ga ham 5 ga ham bo`linmaydiganlari nechta?

A)40 B)36 C)48 D)44

18. ifoda n ning nechta natural qiymatida natural son bo`ladi?

A)3 B)6 C)4 D)5

19. 8 ga bo`linganda 3,12 bo`linganda 7 , 15 ga bo`linganda 10 qoldiq qoladigan eng kichik sonni toping.

A)160 B)151 C) 125 D) 115

20. To`g`ri burchakli uchburchakning gipotenuzasiga tushirilgan balandlik ning gipotenuzadan ajratgan kesmalardan kichigining uzunligi 9 ga teng. Shu balandlik bilan kichik katet orasidagi burchak 30⁰ ga teng . Uchburchakning gipotenuzasini toping ? A) 4,5 B) 9 C) 18 D) 36

21. Ushbu 31323334…….7475 sonning raqamlar yig`indisini toping ?

22. Qo`shni burchaklardan biri bu burchaklar ayirmasidan 4 marta kichik.Shu burchaklar ayirmasini toping ?

23. Rasmda AB=AC, BC=BD=DA bo`lsa

24. tenglamani yeching .

25. a ning qanday qiymatida ax-3=a+4x tenglamaning yechimi bo`lmaydi ?

26. Tenglamani yeching:

27. (2x-1)^.(x-1,5)=0 bo`lsa 2x-1 qanday qiymatlar qabul qiladi ?

28. va bo`lsa c=?

29. 72 sonini 2,3 va 4 sonlariga teskari proporsional bulaklarga yoying.

30. Sement va kumdan iborat 27 kg aralashmaning 50 % ini ssement tashkil kiladi. Aralashmning 30 % inissement bulishi uchun unga kancha kum kushish kerak?